68209400 has 96 divisors (see below), whose sum is σ = 183738240. Its totient is φ = 23064960.

The previous prime is 68209343. The next prime is 68209433. The reversal of 68209400 is 490286.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115907 + ... + 116493.

It is an arithmetic number, because the mean of its divisors is an integer number (1913940).

Almost surely, 2^68209400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68209400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91869120).

68209400 is an abundant number, since it is smaller than the sum of its proper divisors (115528840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68209400 is a wasteful number, since it uses less digits than its factorization.

68209400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 68209400 is about 8258.8982316045. The cubic root of 68209400 is about 408.5840507570.

Adding to 68209400 its reverse (490286), we get a palindrome (68699686).

The spelling of 68209400 in words is "sixty-eight million, two hundred nine thousand, four hundred".